摘要
采用酱油曲霉发酵制备的微生物絮凝剂对广州市猎德污水处理厂浓缩污泥的脱水性能进行研究.实验结果表明,酱油曲霉分泌的微生物絮凝剂对浓缩污泥有较好的脱水效果,调理后的污泥比阻可降至8.9×1011m.kg-1,显著地改善了污泥的脱水性能.与对照样相比,脱水率提高了7%,含水率降低了6%.当絮凝剂的投加量为污泥体积的5%、干重质量浓度为5.8mg.l-1时,污泥的脱水效果最佳,污泥脱水率从75.6%提高到82.6%,污泥含水率从82.4%降到76.4%.微生物絮凝剂和聚丙烯酰胺(PAM)复合使用有助于改善污泥的脱水性能,当10mL116mg.l-1微生物絮凝剂和6mL1g.l-1PAM复合使用时,污泥的脱水率为82.9%,脱水后污泥的含水率为76.1%.
Microbial flocculant excreting by Aspergillus sojae was utilized to perform dewatering experiments in this study. The investigation results indicated that the microbial flocculant could reduce the specific resistance of sludge to 8.9 × 10^11 m · kg^-1. The ratios of dewatering efficiency increased 7%, while those of moisture content were depressed 6%. When the dosage of the microbial flocculant was 5% of the sludge volume, it could improve the dewatering characteristics of the sludge optimally. The percentages of dewatering were increased from 75.6% to 82. 6%, and the moisture contents were decreased from 82. 4% to 76. 4%. Especially, the treatment could be more effective when 10 ml of microbial flocculant combined with 6 ml of polyacrylamide was added into the sludge. The ratios of dewatering and moisture content were 82.9% and 76. 1% when their concentrations were 116 mg · l^-1 and 1g · l^-1 respectively.
出处
《环境化学》
CAS
CSCD
北大核心
2009年第3期414-417,共4页
Environmental Chemistry
基金
广东省科技计划项目(2005B33301004)
关键词
酱油曲霉
微生物絮凝剂
污泥
Aspergillus sojae, microbial flocculant, sludge.
